Crane High School in Texas is at the center of a chlamydia outbreak.
The Crane Independent School District says it has had 20 cases of chlamydia at the high school, reported CBS 7.
On April 27, CISD sent a letter to high school parents, and a warning letter to parents of junior high students on May 1.
Several parents were shocked about the outbreak, while others were not aware of the health problem, noted NewsWest 9.
Chlamydia, a sexually transmitted disease, may not show signs in its early stages, but can become dangerous if it is not treated.
As far as sex education, Crane High School offers only three days of this type of factual biological instruction in the fall semester.
The student handbook says that the school district "does not offer a curriculum in human sexuality," but adds that sex ed may be mentioned in a class.
The handbook adds that parents can pull their kids out of that class, which must teach the following:
Present abstinence from sexual activity as the preferred choice of behavior in relationship to all sexual activity for unmarried persons of school age;
Devote more attention to abstinence from sexual activity than to any other behavior;
Emphasize that abstinence is the only method that is 100 percent effective in preventing pregnancy, sexually transmitted diseases, and the emotional trauma associated either adolescent sexual activity;
Direct adolescents to a standard of behavior in which abstinence from sexual activity before marriage is the most effective way to prevent pregnancy and sexually transmitted diseases; and
If included in the content of the curriculum, each contraception and condom use in terms of human use reality rates instead of theoretical laboratory rates.